The included angle of lathe dead center

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ALP CBT 2 Fitter Previous Paper: Held on 21 Jan 2019 Shift 1
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  1. 90 degree
  2. 30 degree
  3. 45 degree
  4. 60 degree

Answer (Detailed Solution Below)

Option 4 : 60 degree
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Detailed Solution

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Concept:

  • The lathe center is a lathe accessory that is used to support lengthy jobs to carry out lathe operations.
  • Lathe centers are generally made of high-carbon steel which is hardened, tempered, and ground.
  • The center which is accommodated in the main spindle sleeve is known as the ‘live sleeve’ and the center fixed in the tailstock spindle is known as the ‘dead center'.
  • In construction, both centers are identical, made as one unit that consists of a conical point of 60° included angle, a body provided with a Morse taper shank, and a tang.
  • The dead center is made out of high carbon steel, hardened and ground whereas the live center need not have its conical tip hardened as it revolves with the work.
  • A good lubricant should be used for the dead center.

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